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ram cichlid
The ram cichlid, ''Mikrogeophagus ramirezi'', is a species of freshwater fish endemic to the Orinoco River basin, in the savannahs of Venezuela and Colombia in South America. The species has been examined in studies on fish behaviour〔Robins CR, Bailey RM, Bond CE, Brooker JR, Lachner EA, Lea RN, Scott WB (1991) World fishes important to North Americans. Exclusive of species from the continental waters of the United States and Canada. ''Am. Fish. Soc. Spec. Publ.'' 21: p. 243.〕 and is a popular aquarium fish, traded under a variety of common names, including ram, blue ram, German blue ram, Asian ram, butterfly cichlid, Ramirez's dwarf cichlid, dwarf butterfly cichlid and Ramirezi.〔〔Linke H, Staeck L (1994) ''American cichlids I: Dwarf Cichlids. A handbook for their identification, care and breeding.'' Tetra Press. Germany. ISBN 1-56465-168-1〕〔Axelrod HR, Vorderwinkler W (1995) ''Encyclopedia of tropical fishes'' 30th
Edn. TFH Publications, USA.〕 The species is a member of the family Cichlidae and subfamily Geophaginae.〔
==Description==
Wild ram cichlids are often more colorful than the tank-bred fish, which suffer from poor breeding and also being injected with hormones for more color, although this makes as many as one in four males infertile.
Male specimens of the ram usually have the first few rays of the dorsal fin extended, but breeding has made some females also show this. When close to spawning, female rams have a pink or red blush on the abdomen. Females also have a blue sheen over the spot just below the dorsal fin, or a sparse scattering of blue scales in the upper half of the dark spot, and males do not show this. Males reach a maximum length of 7 cm, and females are usually slightly smaller.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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